Network
generic or reserved
U3512
High Voltage System Interlock Circuit B Performance
HVIL loop B is electrically OK but timing/pattern does not match expected behavior — possibly intermittent contact in a connector.
SystemNetwork
Typegeneric or reserved
GroupU3
Range / number5 / 12
Possible causes
- Intermittent contact in HV connector high
- Gateway module routing CAN messages incorrectly low
- CAN terminating resistor (120 Ω) drifted out of spec low
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 100–2000 €
- Estimated time: 1–5 h
- Component: hvil loop b
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012